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STOCKHOLDERS' EQUITY: - Directors Stock Award Plan (Details) - USD ($) $ in Millions |  |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | ---
May 23, 2025 | May 27, 2022 | Jun. 30, 2021 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024
Parent Company (Grupo Mexico) |  |  |  |  |  |
Activity in directors' stock award plan |  |  |  |  |  |
Treasury stock balance at the end of the period (in shares) |  |  |  | 54,595,684 |  | 61,972,864
Directors' Stock Award Plan |  |  |  |  |  |
Share based Compensation Plan |  |  |  |  |  |
Total SCC shares reserved for the plan |  |  |  | 600,000 | 600,000 |
Common shares received on election as director |  |  |  | 1,600 |  |
Additional shares issued at each annual general meeting | 200 |  |  | 1,600 |  |
Numbers of shares shall be granted quarterly and conditioned upon the attendance of each director to each Board meeting |  |  | 400 |  |  |
Period of extension of plan | 3 years | 5 years |  |  |  |
Stock based compensation expense |  |  |  | $ 0.6 | $ 0.9 |
Activity in directors' stock award plan |  |  |  |  |  |
Total shares granted at the beginning of the period (in shares) |  |  |  | (444,400) | (428,800) |
Granted (in shares) |  |  |  | (6,400) | (8,800) |
Total shares granted at the end of the period (in shares) |  |  |  | (450,800) | (437,600) |
Remaining shares reserved |  |  |  | 149,200 | 162,400 |

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